168645285899 has 8 divisors (see below), whose sum is σ = 173926072320. Its totient is φ = 163426263336.

The previous prime is 168645285881. The next prime is 168645285947. The reversal of 168645285899 is 998582546861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168645285899 - 2¹⁶ = 168645220363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168645285299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15435419 + ... + 15446340.

It is an arithmetic number, because the mean of its divisors is an integer number (21740759040).

Almost surely, 2^168645285899 is an apocalyptic number.

168645285899 is a deficient number, since it is larger than the sum of its proper divisors (5280786421).

168645285899 is a wasteful number, since it uses less digits than its factorization.

168645285899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30881929.

The product of its digits is 298598400, while the sum is 71.

The spelling of 168645285899 in words is "one hundred sixty-eight billion, six hundred forty-five million, two hundred eighty-five thousand, eight hundred ninety-nine".